package xw.qxypt.modules.socket.util;

public class HexString2BinaryStr {
	private static String hexStr =  "0123456789ABCDEF";  
    private static String[] binaryArray =   
        {"0000","0001","0010","0011",  
        "0100","0101","0110","0111",  
        "1000","1001","1010","1011",  
        "1100","1101","1110","1111"};  
    public static String bytes2BinaryStr(byte[] bArray){  
        String outStr = "";  
        int pos = 0;  
        for(byte b:bArray){  
            //高四位  
            pos = (b&0xF0)>>4;  
            outStr+=binaryArray[pos];  
            //低四位  
            pos=b&0x0F;  
            outStr+=binaryArray[pos];  
        }  
        return outStr;  
          
    }  
    public static byte[] HexStringToBinary(String hexString){  
        //hexString的长度对2取整，作为bytes的长度  
        int len = hexString.length()/2;  
        byte[] bytes = new byte[len];  
        byte high = 0;//字节高四位  
        byte low = 0;//字节低四位  
  
        for(int i=0;i<len;i++){  
             //右移四位得到高位  
             high = (byte)((hexStr.indexOf(hexString.charAt(2*i)))<<4);  
             low = (byte)hexStr.indexOf(hexString.charAt(2*i+1));  
             bytes[i] = (byte) (high|low);//高地位做或运算  
        }  
        return bytes;  
    } 
    public static String hexString2BinaryStr(String hexString) {
    	return bytes2BinaryStr(HexStringToBinary(hexString));
    }
}
